| 1892 | December 7 | Walla Walla College holds its first class, enrollment 103 |
| 1896 | May 18 | First graduation, three graduates |
| 1897 | April 25 | First Mountain Ash tree planted on campus |
| 1899 | August | College Bakery opens |
| 1901 | March 31 | WWC is incorporated |
| 1902 | Nov/Dec | Typhoid epidemic in College Place; three students die |
| 1903 | January | Smallpox epidemic in College Place |
| 1909 | April 22 | Jubilee Program celebrates paying off the college debt |
| | May 24 | First baccalaureate degree issued |
| | August 6 | Artesian well drillers strike water supply |
| 1910 | October 13 | The laundry and boiler room at the back of North Hall (old Administration building) catch fire; a wind shift saves the dormitory section |
| 1911 | October | New power plant replaces one destroyed in 1910 fire |
| 1913 | January 27 | University of Washington grants accreditation to the preparatory department of WWC for one year |
| | March 28 | College Place SDA church (1st Village Hall) opens |
| | Autumn | WWC enrollment reaches 400 students |
| 1914 | March 9 | Broom-making business discontinued |
| | May | Collegiate Association is created (precursor of ASWWU) |
| | Sept. 9 | Bachelor of Music degree instituted |
| 1915 | May | Western Collegian (the first yearbook) is published |
| 1916 | February | Snow storm leaves 48 inches of snow in 54 hours |
| | September | Collegian (a monthly magazine) is first published |
| 1917 | May | Mountain Ash (the renamed yearbook) is first published |
| | | Eleven college students graduate—a new record |
| | May 24 | Alumni Association organized |
| 1918 | November 3 | Flu epidemic; college closes for about a week |
| 1919 | January 18 | College Place SDA church (the first Village Hall) burns |
| | January 28 | Fire destroys the fourth floor of the old Ad Building |
| 1920 | April | WWC church opens (the second and current Village Hall) |
| 1922 | Spring | ASWWC replaces Collegiate Association |
| 1924 | | Science Building (Bowers Hall) completed |
| 1925 | February 5 | Collegian becomes a weekly paper |
| 1926 | January 21 | College enrollment reaches 500 students |
| 1927 | April 28 | OPS is established |
| | Fall | Johnson Music Conservatory completed |
| | | AGA is established |
| 1931 | Mar. 31-Apr.1 | Flood in College Place covers a few streets in 4-5 ft of water (second photo) (film) |
| | April 22 | First accreditation report denies accreditation to WWC |
| 1933 | July 1 | Fire destroys most of Rachel Oakes Preston House (women’s dorm) |
| | October 17 | WWC admitted to the Association of Colleges and Secondary Schools of Seventh-day Adventists by the Board of Regents (denominational accreditation) |
| 1934 | Autumn | Conard Hall completed |
| 1935 | January 15 | WWC receives senior college accreditation from the University of Washington |
| | April 3 | WWC receives four-year accreditation from the Northwest Association of Secondary and Higher Schools |
| 1936 | 1936 | Conard Hall dedicated |
| | July 15 | 6.0 earthquake rattles windows at WWC |
| 1938 | August 4 | Fire in the West Hall basement |
| 1939 | Spring | Columbia Auditorium opens (second photo) |
| 1940 | Dec. 12 | Men’s dorm quarantined because of influenza epidemic |
| 1942 | | Martin Airfield is built in College Place |
| 1944 | May 11 | Peterson Memorial library is inhabited |
| 1945 | Dec. 24 | City of College Place is incorporated |
| 1947 | Summer | School of Nursing opens at Portland Sanitarium |
| | September | Sittner Hall, though unfinished, is occupied |
| 1948 | Autumn | Master in Biology approved |
| 1950 | June | Master in Education approved |
| 1954 | August | Marine station property is purchased at Rosario Bach, near Anacortes, Washington |
| | Autumn | First Mask is published |
| 1957 | October | Over 100 dormitory students are incapacitated by the flu |
| 1958 | | Cafeteria (later named Kellogg Hall) is built |
| | October | College drills a new artesian well to replace 1909 well |
| 1959 | January | Enrollment raises above 1400 for first time |
| 1962 | October 20 | College Church (now University Church) holds first service (construction video) |
| 1963 | April 25 | KGTS-FM goes on the air for first time |
| 1964 | | Walla Walla Valley Academy (WWVA) opens in current location |
| | April 29 | Kretschmar Hall officially named, dedicated November 1st |
| 1965 | August 22 | Smith Hall dedicated |
| | Nov. 14 | College Bakery closes |
| 1966 | | West Hall, College Bakery, old swimming pool, old academy/normal building and the academy annex all removed during the school year |
| | February 27 | Music department moves into the Fine Arts Center, dedicated December 4th |
| 1967 | June 2 | Life Sciences building (Rigby Hall) is dedicated |
| 1969 | | Alumni Gym (Winter Education Complex or WEC) is opened |
| 1970 | October | Highrise women’s dorm (Foreman Hall) opens |
| | October 3 | Biology Lodge near Tollgate, Oregon burns |
| 1971 | October 11 | Engineering Department is accredited by the Engineers’ Council for Professional Development |
| 1972 | April | Board approves the purchase of Hallmark Apartments, which opened in September |
| | December | College is reaccredited for ten years |
| 1973 | May 17 | OPS ceases to function |
| 1974 | January 13 | Clyde and Mary Harris Art Gallery opens |
| | Autumn | Harris Pine Mills opens in College Place |
| 1975 | January 8 | Fire in a building adjacent to Foreman Hall damages the dorm building |
| 1976 | October | Enrollment tops 2000 for first time |
| 1977 | | Health Sciences Offices open |
| 1978 | | Nursing Dormitory, Portland Campus (Howard Hanson Hall) opens |
| | Spring | OPS reinstated |
| | March 23 | Columbia Auditorium is destroyed by fire |
| | Autumn | Classes begin in Industrial Technology Center (now Canaday Technology Center or CTC) (second photo) |
| 1980 | April | Sociology and Social Work department is accredited by the Council on Social Work Education. |
| | June 30 | College laundry closes (second photo) |
| 1981 | | Havstad Alumni Center opens. |
| 1994 | Nov. 3 | Lindgren Chemistry Wing (Rigby) dedication |
| 1996 | August 20 | New College Store ribbon cutting |
| 1997 | | School of Social Work and Sociology opens campus in Missoula, Montana |
| | April 27 | Chan Shun Pavilion dedicated |
| 2001 | | School of Social Work and Sociology opens campus in Billings, Montana |
| May | Lindgren Hall (Rosario) opens |
| 2003 | Autumn | Original Administration building demolished (second photo) (third photo) |
| | Sept. 16 | Mountain View Apartments official opening |
| 2004 | August 22 | Rogers Adventist School (new) ribbon cutting |
| | Dec. 17 | Rogers Elementary School demolished |
| 2007 | April 28 | Grand opening of new Administration building (second photo) |
| | September 1 | Walla Walla College officially becomes Walla Walla University |
| 2008 | Summer | Soccer field Completed |
| 2009 | Summer | The Hebbel-Janke Softball Complex (women's) completed & dedicated on October 4th |
| 2010 | March | The Express expansion completed |
| November | Nursing, Health, PE, and Social Work remodeling of WEC finished. |
